KC-97 crew and GCI radar: unidentified object near Newfoundland (6 July 1955)
On 6 July 1955 the crew of a USAF KC-97 tanker reported seeing an unidentified airborne object near Newfoundland. At the same time a ground-controlled intercept (GCI) radar in the area picked up a return that "apparently was identical" to the object the crew was watching. A Headquarters USAF intelligence committee met on 8 July and said it was "unable to explain the simultaneous ground radar returns and aircrew visual sightings". It "tentatively" accepted Northeast Air Command's view that the cause was an electrical phenomenon plus misinterpretation by the aircrew, and classified the incident as an Unidentified Flying Object. The Directorate of Intelligence also discussed the possibility of a high-performance unconventional aircraft. Because of that, it proposed ordering immediate fighter scrambles against future sightings. The record sits in DOW-UAP-D095, a 57-page compilation mostly about the Avro "Project Y2"/Ladybird saucer-shaped VTOL project. *Method note: war.gov blocks this server. DOW-UAP-D095 was read from the original PDF via the ufotransparency.com mirror. The KC-97 pages have no usable text layer, so they were read as page images (PDF pp. 36-46).*
Evidence, in date order (2)
- 6 Jul 1955Ground-controlled intercept radarsensor dataa return apparently identical to the object the crew saw DOW-UAP-D095
- 11 Jul 1955HQ USAF intelligence committeeofficialcould not explain the simultaneous radar and visual sightings and classified it UFOB DOW-UAP-D095
How plausible · High
A released USAF memo records simultaneous radar and aircrew sightings it could not explain.
- ●●Access Aircrew and GCI radar.
- ●●No gain sought Official.
- ●●Independent convergence Radar and visual matched.
- ●●Checkable details check out USAF memo.
- ●●Physical traces or official reaction Radar.
- ●○Character record Crew unnamed.
Plausibility weighs how well an account fits where secrecy hides the documents by design, so missing records never count against it. Strength measures what is documented. Assessed 2026-10-23.
On the record
- Memorandum for Record, AFOIN-2C4, Col. MacDuff, 11 July 1955: "To evaluate Kc 97 crew sightings and ground radar returns of object in the Newfoundland area" (coordinates partly illegible on this page). The committee was directed "on 8 July to evaluate the 6 July Kc 97 sightings and GCI radar returns", "as summarized and detailed in CAF IN 15592, dtd 6 July 55 and CAF IN 90703 dtd 7 July 55". It reviewed "reports summarizing the incident, the crew interrogations and the NEAC evaluation". (DOW-UAP-D095, PDF p.40)
- Conclusions, same memo: "no intelligence is available to support or deny the existence of unconventional Soviet aircraft comparable to those under consideration in the US and Canada and providing performance such as reported." / "The committee was unable to explain the simultaneous ground radar returns and aircrew visual sightings, and tentatively accepts the NEAC evaluation attributing the incident to electrical phenomenon on the one hand and misinterpretation of the sightings by aircrew members on the other." / "this incident should be classified as UFOB." Recommendation: "in the event of future incidents of this nature fighter scrambles be effected without delay." (DOW-UAP-D095, PDF p.40)
- Air Staff Summary Sheet, 28 July 1955, Col. Frank B. Chappell, Directorate of Intelligence, subject "Request NEAC for Immediate Fighter Scramble Against Flying Objects": "On 6 July the crew of a KC-97 tanker reported the sighting of an unidentified airborne object in the Newfoundland area (4910N/5950W). At the time of the sighting a GCI radar in the same area obtained a radar return of an object which apparently was identical to the one the KC-97 crew had under visual observation." It adds: "the committee discussed the possibility that the object might have been an high performance unconventional aircraft. This Directorate is of the opinion that the development of such an aircraft by an unfriendly nation would constitute a serious technological threat to the United States". (DOW-UAP-D095, PDF p.41)
- An earlier draft of the same sheet addresses both Alaskan and Northeast Air Commands. (DOW-UAP-D095, PDF p.36)
- Tab B, "Headquarters USAF Evaluation of 6 July 1955 Sightings of Unidentified Object in the Newfoundland Area": the committee "on 8 July 1955 reviewed all available information ... (4910N/5950W)", and its findings repeat the memo, ending "That this incident be classified as an Unidentified Flying Object." (DOW-UAP-D095, PDF p.45)
- The findings were sent to the Chief of Staff, Royal Canadian Air Force, Director of Air Intelligence, under a cover letter signed by Col. C. U. True dated 9 August 1955. (DOW-UAP-D095, PDF pp.43, 46)